Links for DIY boost convertor and Joule Thief

[Chuck Roberts]

I'm trying to learn about these. I thought I would share.
https://www.youtube.com/playlist?list=PL4Eg18Oxse-_Vz7uSH7ZpWT4zFBozLmiF

 

[Chuck Roberts]

Yep, I'm playing with the various voltage boosters too. I can boost 2AA at .5v each (total 1vdc) to 5vdc, then reduce to 3.3vdc to run an LED. Current works just fine too.

 

[Ralph Mowery]

In article <46fbbe57-7094-469b-b247-71608d2df358@googlegroups.com>,
weddingabc2015@gmail.com says...

I'm trying to learn about these. I thought I would share.
https://www.youtube.com/playlist?list=PL4Eg18Oxse-_Vz7uSH7ZpWT4zFBozLmiF

I bought a few of the step up and step down ones from China off ebay.
Interisting to play with. They seem to act almost like a DC transformer
in that if you set the output to a certain voltage and load and vari the
input voltage , the current drawn will go up and down in the opposit
direction.

They seem to hold the output voltage almost constant when the input
voltage is varied over a large range.

 

[default]

On Sun, 22 Jan 2017 11:34:26 -0800, Chuck Roberts wrote:

I'm trying to learn about these. I thought I would share.
https://www.youtube.com/playlist?list=PL4Eg18Oxse-_Vz7uSH7ZpWT4zFBozLmiF

Joule thief? In my youth we called that a "blocking oscillator." I had
one operating a speaker on my bicycle as a horn, they were in all TV sets
too in the vertical deflection circuits. (the vertical and horizontal
were designed to be free-running oscillators in case the sync was lost so
they didn't burn the phosphors in the CRTs)